I try to use brave on windows 10.
I find two problems on two different webpages.

On brave community when I try to open window for writing new topic, I was unable, though I disable all shields. The message I received is “Composer was opened without a draft key” and no frame opened to write the issue.

Second issue I face while opening a research article in PDF file on IEEE website. The brave browser does not open any PDF file in IEEE webpage, though I disable all shields. It only allows to save file without opening in browser, as shown in the following figure.